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Diffstat (limited to 'vendor/bytemuck/tests/doc_tests.rs')
-rw-r--r-- | vendor/bytemuck/tests/doc_tests.rs | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/vendor/bytemuck/tests/doc_tests.rs b/vendor/bytemuck/tests/doc_tests.rs deleted file mode 100644 index d08e970..0000000 --- a/vendor/bytemuck/tests/doc_tests.rs +++ /dev/null @@ -1,123 +0,0 @@ -#![allow(clippy::disallowed_names)] - -//! Cargo miri doesn't run doctests yet, so we duplicate these here. It's -//! probably not that important to sweat keeping these perfectly up to date, but -//! we should try to catch the cases where the primary tests are doctests. -use bytemuck::*; - -// Miri doesn't run on doctests, so... copypaste to the rescue. -#[test] -fn test_transparent_slice() { - #[repr(transparent)] - struct Slice<T>([T]); - - unsafe impl<T> TransparentWrapper<[T]> for Slice<T> {} - - let s = Slice::wrap_ref(&[1u32, 2, 3]); - assert_eq!(&s.0, &[1, 2, 3]); - - let mut buf = [1, 2, 3u8]; - let _sm = Slice::wrap_mut(&mut buf); -} - -#[test] -fn test_transparent_basic() { - #[derive(Default)] - struct SomeStruct(u32); - - #[repr(transparent)] - struct MyWrapper(SomeStruct); - - unsafe impl TransparentWrapper<SomeStruct> for MyWrapper {} - - // interpret a reference to &SomeStruct as a &MyWrapper - let thing = SomeStruct::default(); - let wrapped_ref: &MyWrapper = MyWrapper::wrap_ref(&thing); - - // Works with &mut too. - let mut mut_thing = SomeStruct::default(); - let wrapped_mut: &mut MyWrapper = MyWrapper::wrap_mut(&mut mut_thing); - let _ = (wrapped_ref, wrapped_mut); -} - -// Work around miri not running doctests -#[test] -fn test_contiguous_doc() { - #[repr(u8)] - #[derive(Debug, Copy, Clone, PartialEq)] - enum Foo { - A = 0, - B = 1, - C = 2, - D = 3, - E = 4, - } - unsafe impl Contiguous for Foo { - type Int = u8; - const MIN_VALUE: u8 = Foo::A as u8; - const MAX_VALUE: u8 = Foo::E as u8; - } - - assert_eq!(Foo::from_integer(3).unwrap(), Foo::D); - assert_eq!(Foo::from_integer(8), None); - assert_eq!(Foo::C.into_integer(), 2); - assert_eq!(Foo::B.into_integer(), Foo::B as u8); -} - -#[test] -fn test_offsetof_vertex() { - #[repr(C)] - struct Vertex { - pos: [f32; 2], - uv: [u16; 2], - color: [u8; 4], - } - unsafe impl Zeroable for Vertex {} - - let pos = offset_of!(Zeroable::zeroed(), Vertex, pos); - let uv = offset_of!(Zeroable::zeroed(), Vertex, uv); - let color = offset_of!(Zeroable::zeroed(), Vertex, color); - - assert_eq!(pos, 0); - assert_eq!(uv, 8); - assert_eq!(color, 12); -} - -#[test] -fn test_offsetof_nonpod() { - #[derive(Default)] - struct Foo { - a: u8, - b: &'static str, - c: i32, - } - - let a_offset = offset_of!(Default::default(), Foo, a); - let b_offset = offset_of!(Default::default(), Foo, b); - let c_offset = offset_of!(Default::default(), Foo, c); - - assert_ne!(a_offset, b_offset); - assert_ne!(b_offset, c_offset); - // We can't check against hardcoded values for a repr(Rust) type, - // but prove to ourself this way. - - let foo = Foo::default(); - // Note: offsets are in bytes. - let as_bytes = &foo as *const _ as *const u8; - - // We're using wrapping_offset here because it's not worth - // the unsafe block, but it would be valid to use `add` instead, - // as it cannot overflow. - assert_eq!( - &foo.a as *const _ as usize, - as_bytes.wrapping_add(a_offset) as usize - ); - assert_eq!( - &foo.b as *const _ as usize, - as_bytes.wrapping_add(b_offset) as usize - ); - assert_eq!( - &foo.c as *const _ as usize, - as_bytes.wrapping_add(c_offset) as usize - ); -} |